| Arctic Sea, Greenland, North Atlantic | |
| Year | 0 - 35 km |
| 1996 | 0.5 |
| 1997 | 0.5 |
| 1998 | 0.6 |
| 1999 | 0.6 |
| 2000 | 0.8 |
| 2001 | 0.8 |
| 2002 | 0.5 |
| 2003 | 0.7 |
| 2004 | 0.5 |
| 2005 | 1.7 |
| 2006 | 0.8 |
| 2007 | 0.8 |
| 2008 | 1.3 |
| 2009 | 1.1 |
| 2010 | 1 |
| 2011 | 0.6 |
| 2012 | 1.1 |
| 2013 | 0.5 |
| 2014 | 6 |
| 2015 | 1.3 |
| 2016 | 0.5 |